Shuttle mechanism for sewing-machines.



L. E. JOHNSON & E. ERICKSON.

SHUTTLE MECHANISM FOR SEWING MACHINES- APPLICATiON FILED OCT. 3. 1913. RENEWED FEB. 18.19154 1 1 5 1,791. Patented Aug. 31, 1915.

2 SHEETS-SHEET l.

IZOLUMEXA PLANOGRAPH CD WASHINGTON. n, c.

L. E. JOHNSON & E. ERHJKSON. SHUTTLE MECHANISM FOR SEWING MACHINES. APPLICATION FILED OCT-3.1913- RENEWED FEB. 18,1915.

1 151 794. Patented Aug. 31, 1915.

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W m w COLUMBIA PLANOURAPH COUWASHINGTON, n. c.

firn earns men LAWRENCE E. JOHNSON, OF WINTHROP, AND EDWARD ERICKSON, OF LYNN, MASSA- CHUSETTS, ASSIGNORS TO VICTOR SHOE MACHINERY C0,,0F BOSTON, MASSACHIL SETTS, A CORPORATION OF MASSACHUSETTS.

SHUTTLE MECHANISM FOR SEWING-MACHIN ES.

Original application filed May 19, 1913, Serial No. 768,671.

Specification of Letters Patent.

1913, Serial No. 793,472. Renewed February 18, 1915. Serial No. 9,210.

To all whom it may concern:

Be 1t known that we, LAWRENCE E. J OHN- ,SON, a citizen of the United States of America, and a resident of WVinthrop, in the county of Suffolk and State of 'Massac'husetts, and EDWARD ERICKSON, a subject of the King of Sweden, and a resident of Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Shuttle Mechanisms for Sewing-Machines, of which the following is a specification.

This invention relates to improvements in shuttle mechanisms for shoe sewing machines, and particularly that class of machines in which the outer soles of shoes are sewed to the welt.

It has for its object the simplification in construction and operation of the shuttle mechanism.

The present invention is a division of an application filed by us May 19, 1913, the serial number of which is 768,671.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a plan of a sewing machine embodying the principles of the present invention. Fig. 2 represents an elevation of the left end of the same. Fig. 3 represents a section through the shuttle driving mechanism, the cutting plane being on line 3-3 on Fig. 2. Fig. 4 represents a sectional detail of the shuttle cap locking mechanism, the cutting plane being on line 4-4 on Fig. 2, and Fig. 5 represents a transverse section of the same, the cutting plane being on line 55 on Fig. 4, and Fig. 6 represents a vertical section through the fixed raceway and its pivoted Similar characters designate like parts throughout the several figures of the drawings. In the drawings, 20 is the base of the machine adapted to be secured to a column and having the end frames 21 and 22 provided with bearings for the revoluble shaft 23. The revoluble shaft 23 has the driving wheel 24 secured to one end thereof while to its opposite end is keyed the cam disk 2 Interposed between the side frames 21 and 22 and keyed to the shaft 23 are the cam disks 26 and 27. To the inner side of the side frame 21 is secured the work support 28 which may be of any well-known construction, the securing means consisting of the bolts 2929. The side frame 21 has also formed upon its inner face a race 30 open at the top and at one side. In this raceway is rotatably positioned the shuttle 31 which is driven by a plate 311 having a shuttle engaging lug 312 and provided with a shank 32 having keyed to its outer end a gear 33 partially surrounded by the flange 34 formed on the outer face of the side frame 21.

,Meshing with the gear 33 is a gear segment 35 formed upon the end of a lever 36 pivoted at 37 to the side frame 21, the opposite end or arm of said lever being articulated at 38 to a connecting rod 39 pivotally connected to the cam disk 25 by the stud 40. When the cam disk 25 is rotated in the direction of the arrow a on Fig. 2 an oscillating movement will be imparted to the segment 35 by the connecting rod 39. It will be observed that the total length of the operating arm of the lever 36 and the connect ing rod 39 between the centers of the stud 40 and pivot 37 is greater than the direct distance between said points so that it is impossible for these members to come into alinement under any condition. This oscil' lation of the segment 35 will impart the required movement to the plate 311 and through the lug 312 to the shuttle 31. The

shuttle 31 is provided with a cap 41 pivoted at 37 to the side frame 21, said cap being adapted to be moved about its pivot to permit the removal of the shuttle 31 when it is desired to renew the bobbin and being provided with a groove in its inner cylindrical. wall in the same plane with the groove in said raceway 30. Normally the cap 41 is retained in the position shown in the drawings by the locking member 43 extending therefrom into a slot in the extension 44 of the side frame 21. In a bearing in the eX- tension 44 is a member 45 having a depression in its inner end into which extends the outer end of the member 43 which is provided with a pin 46 normally engaging a notch 4'1 in the member 45 to limit the os- Q llation of the member 45 about its axis.

A portion of the wall of said depression is cut away to permit the removal of the looking member 43. The outer end of the member 45 has secured thereto by a nut 431 a handle 48 by which said member 45 may be moved sufficiently about its axis to cause the cutaway portion thereof to register with the slot in the arm 44 and thus permit the locking member 43 to be removed from the depression in the end of the member 45 and the cap 41 to be moved upwardly about its pivot 87 so that the shuttle 31 may be removed.

The cap 41 is provided with an open-ended chamber 56 adapted to receive a heater the heat from which will keep the wax thread T within the shuttle 31 in condition for use. 7

The shuttle driver 311 is provided with a lug which coacts with the shuttle 31 to drive the latter in the usual manner, said shuttle being provided with a peripheral flange 180 fitting in grooves in the shuttle race 30 and'the shuttle cap 41.

The machine is provided with mechanisms for forming the stitch, feeding the work, operating the looper, guiding the needle, and locking the thread, all driven by cams formed in the cam members 25, 26, and 27. As these mechanisms form no part of the present invention, and are fully described in the application heretofore referred to, of which this application is a division, it is believed to be unnecessary to further describe them herein.

It will be seen that by the construction shown and described, a very compact shuttle mechanism is provided in which the parts are reduced to a minimum.

It is believed that the operation and many advantages of the invention will be fully understood from the foregoing description.

Having thus described our invention, we claim:

1. In a shoe-sewing machine, the combination of a shuttle; driving mechanism therefor; a fixed raceway for said shuttle; a pivoted cap for said shuttle; a lateral projection extending from a side face of said cap and adapted to be positioned within a slot in the frame of the machine; and a manually controlled member within said slot coacting with said projection to prevent its removal from said slot and thereby lock said cap. 7 V

2. In a shoe-sewing machine, the combination of a shuttle; driving mechanism therefor; a fixed raceway for said shuttle; a pivoted cap for said shuttle; a projection on said cap; and a tubular member adapted to be oscillated and inclose said projection, said tubular member being provided with a slot through one wall thereof adapted to be positioned to release said projection.

3. In a shoe-sewing machine, the combination of a shuttle; driving mechanism therefor; a fixed raceway for said shuttle; a pivoted cap for said shuttle; a projection on said cap; a tubular inclosing member for said projection having a slot through one wall thereof; and means for oscillating said inclosing member to release said projection.

4. In a shoe-sewing machine, the combination of a shuttle; driving mechanism there for; a fixed raceway for said shuttle; a pivoted cap for said shuttle; a projection on said cap; a tubular inclosing member for said projection having a slot through one wall thereof; a handle for oscillating said inclosing member to release said projection;

and means for limiting the oscillation of said inclosing member.

5. In a shoe-sewing machine, the combination of a raceway having a groove therein and open at one side and at the top, the

closed side of said raceway being provided with a central bearing; a cap pivoted to said raceway and normally closing the top opening and havinga groove therein inthe same plane with the groove of said raceway; a substantially circular shuttle rotatable in said raceway having a peripheral flange fitting the grooves of said raceway and cap; means forlocking said cap to said raceway; and an oscillating member interposed between said shuttle and the closed side of said raceway and provided with a centrally disposed shaft extending from one face thereof positioned in said bearing and a shuttle engaging lug extending from the opposite face.

6. In a shoe-sewing machine, the combination of a raceway having a groove therein and open at one side and'at the top; a substantially circular shuttle rotatable in said raceway having a peripheral flange fitting said groove; means for preventing the accidental displacement of said shuttle from said raceway; and an oscillating member interposed between said shuttle and the closed side of said raceway and provided with a .shuttle engaging lug.

7. In a shoe-sewing machine, the combination'of a raceway having a groove therein and open at the, top; a cap for said top opening having a groove in the same plane with the groove in said raceway and horizontally pivoted at one end; a shuttle having a peripheral flange fitting said grooves; a pro-- j ection extending laterally from the opposite end of said cap and normally-positioned in a recess in the frame of a machine; and a tubular member adapted to be oscillated in said frame and inclose said projection, said tubular member being provided with a slot through one wall thereof adapted to be positioned to release said projection and permit said cap to be moved about its pivot.

8. In a shoe-sewing machine, the combinationof'a raceway having a groove therein and open at the top; a cap for said top opensaid cap to be moved about its pivot; and a radial pin in said projection to limit the oscillation of said tubular member in either 15 direction.

Signed by us at Boston, Mass, this 2nd day of October, 1913.

LAWVRENCE E. JOHNSON. EDl VARD ERICKSON.

Witnesses:

NATHAN C. LoMBARn, l/VALTER E. LOMBARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

